Follow along as NASA launches the Mars 2020 Mission, perhaps the most ambitious hunt yet for signs of ancient life on Mars. "Looking for Life on Mars" from NOVA l PBS is now streaming on the PBS Video app. | PBS

Here’s why, from the vantage point of a planet being consumed by a supermassive black hole, the universe would appear distorted in both time and space. Watch "NOVA Universe Revealed: Black Holes" on the PBS Video app or online to learn more: https://to.pbs.org/3COMaqJ | NOVA l PBS

What's inside a black hole? Here are three theories. Don't miss "Black Hole Apocalypse," airing TONIGHT at 9/8c on PBS: www.pbs.org/wgbh/nova/space/black-hole-apocalypse.html | NOVA l PBS